It sounds like he could have aspergers, but it also sounds like he has problems with anger that might not nessisarily have to do with that. The main problems with aspergers are problems with social interaction and communication, sensory issues, executive functioning issues which can resemble depression though it is possible to have depression in addition to aspergers as well.

But yeah he certainly needs some sort of professional help it seems...anti-depressants don't work for everyone, and sometimes its just a matter of finding one that does help...not sure anti-depressants do much for anger issues and such though. But yeah it would be best to inform the psychiatrist he doesn't think its helping any, and perhaps try something else...maybe looking into therapy of some kind would also be good.